| 摘要 |
<p>A double-cylinder circular machine (1) for producing tubular knitted manufactures, particularly for making hosiery items or the like, which comprises a supporting structure (2) which is provided with a footing (3) for resting on the ground which supports, so that it can rotate about its own vertically-oriented axis (4), a lower needle cylinder (5). The supporting structure (2) comprises at least one column (6) which is extended substantially vertically, protrudes upward from the footing (3) and supports, so that it can rotate about its own axis (7), an upper needle cylinder (8) which is arranged above the lower needle cylinder (5). The machine (1) comprises means (9) for the actuation of the lower needle cylinder (5) and of the upper needle cylinder (8) with a rotary motion about their axes (4, 7). The actuation means (9) comprise a main motor (10), which is connected kinematically to the lower needle cylinder (5) and to the upper needle cylinder (8) by means of a main shaft (11), which is arranged within the column (6) and is oriented so that its axis (12) is vertical. The upper needle cylinder (8) is supported, so that it can rotate about its own axis (7), by an arm (13), which in turn is supported by the column (6) so that it can rotate about the axis (12) of the main shaft (11). The machine (1) comprises means (14) for the rotation of the arm (13) about the axis (12) of the main shaft (11) with respect to the column (6) to provide the transition of the upper needle cylinder (8) from an active position, in which it is arranged coaxially to the lower needle cylinder (5), to an inactive position, in which it is spaced with its axis (7) laterally to the axis (4) of the lower needle cylinder (5), and vice versa. The rotation means (14) are constituted by the same main motor (10).</p> |
